<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
    var arr = [9,7,3,6,4,1];
    console.log(arr.sort( (a,b)=>{
        if(a>b)
        {
            return 1;
        }
        if(a<b)
        {
            return -1;
        }
    }))
</script>
</html>